Below is a list of Genoa IL zip codes. For your research we have also included Genoa Area Code, Time Zone, UTC and the local Dekalb County FIPS Code. Each Genoa Illinois zip code has a center Longitude / Latitude point (the Genoa center is -88.694702148438 / 42.097599029541). For your convenience we have also indicated if that zip code in Genoa observes Daylight Savings time.